A GPRS device, which resembles a modem with an extended at command set, must define a context using an at command before it enters data mode.

GPRS设备类似于拥有扩展AT命令集的调制解调器，在进入数据模式之前必须使用AT命令定义一个上下文。

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This system uses a wireless modem with USB port based on SIM300 GPRS module and the MAS device of China Mobile.

基于原有的SIM300 GPRS模块和移动公司的MAS设备，研发USB接口的无线调制解调器。

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The monitored data information is transmitted remotely to higher environmental protection departments through the wireless GPRS and a modem.

将监测的数据信息通过无线gprs经调制解调器远程传输到上级环保部门。

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FedEx generally uses a GPRS cellular modem to upload data from a courier's handheld computer to the company's servers, allowing it to keep up-to-the-minute tracking information.

FORBES: FedEx Bites Into Bluetooth